Exact Location of Conversation Histories

Where is the exact location of chat histories? I'm in username/Library/Application Support/Skype but I don't see anything remotely like chat histories. In the folder with my Skype name, there are more files with extensions I can't open, and nothing indicating it might be a folder or files for chat histories. Can I access the chat histories outside the Skype program? Can I view them without the program, and back them up?